Balanced cord-drop attachment.



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BALANCED CORD DROP ATTACHMENT.

APPLICATION FILED MAB. 8.19%.

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rrnn STATES Patented February" 28, 1905,

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BALANwED CORD-DROP ATTACfil'lWlElii'lll SPECIFICATION forming part of Letters Patent No. 783,742, dated February 28, 1905.

Application filed March 8, 1904. Serial No. 197,133

To all whom it may concern:

Be it known that I, HENRY DOLIER, Jr, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Balanced Cord-Drop Attachment, of which the following is a specification.

My invention relates to incandescent-lamp attachments whereby a lamp suspended by a flexible cord-drop or other fixture may be held in a position such that the axis of the lamp is approximately horizontal in order that the lamp may produce the maximum illumination in a direction vertically downward.

My invention consists also of means whereby a lamp so supported may be rotated into any position in a horizontal plane or other plane, whereby electrical communication between the lamp and the cord-drop or fixture may be maintained.

My invention consists of a device to be attached ,to a cord-drop or other lixture intermediate the lamp-socket and such cord-drop or fixture, such device comprising a gooseneck attachment for the lamp-socket and a retatable contact member intermediate the gooseneek fixture and drop-cord.

The usual mode of supporting an incandescent lamp is by a cord-drop consisting of the conductors which convey the current to and from the lamp, the lamp-axis being practically coincident with the vertically-hanging cord. It is found that an incandescent lamp so suspended and as extensively used in iactories, machine-shops, and the like radiates the greater portion of the light in horizontal directions rather than vertically downward, the latter direction of radiation being most desirable where workmen require the lamp to be placed immediately over their bench or machine in order to illuminate their work in the most thorough manner. i have found by photometer tests that the vertically-hanging incandescent lamp if the illumination in horizontal directions is expressed by sixteen-cam dle power the illumination vertically downward, all conditions being the same, is expressed by 7 .Qcandle power. In other words, the ordinary incandescent lamp in order to cause the greatest illumination vertically downward must be turned through a right angle, so that its axis becomes practically horizontal. Vorkmcn Frequently do so turn the lamp by tying it up to some fixed object, and then they immediately lind that due to the twisting tendencies of the d rop-cord the lamp will assume undesired positions.

It is to gain the advantages of maximum downward illumination and to prevent the lamp from assuming undesired positions about the cord that my invention is adaptable.

Reference is to be had to the accompanying drawings, in which Figure l is a top plan view of my improved lamp attachment; and Fig. 2 is a side view, partly in section, of the same.

Referring to said figures, i represents an ordinary incanr lcsccnt lamp, with its filament (a and axis practically horizoi'ital.

2 is a reflector, preferably parabolic in shape, having the neck member 3, through which the lamp 1, is inserted. The neck 3 terminates in clasps or lingers at, which engage or embrace the bead 5, spun in the metal socket-casing 6. The reflector 2 is rotatable in virtue of such construction to any position about the axis of lamp 1.

6 is any type of incandescent-lamp socket, which may have the key K or be keyless.

7 is a gooseneck olt' metallic. or other tubing threaded into the socket (S at one end and engaging in the bushing 8 at its upper end, 8 being secured in the smm-mctal spherical shell 9, which cooperates with the upper shell 10 to form a practically spherical hrmsing, of which the two halves may rotate with respect to each other.

11 is a screw-threaded bushing in the shell 10 and is adapted to receive a lixture connection or the insulating-bushing '12 when the device is to be employed with a flexible corddrop, such as 13, consisting of twisted conductors. One of these conductors is held under the binding-screw l t and the other under the binding-screw These screws engage in the metallic tongue 16 and the contactplate 18, respectively. These members are secured to the porcelain terminal base 19, secured by screws 20 within the hemispherical metal shell .10. The tongue 16 1s a verticallyprojecting portion of the metallic annular member 17, located within an annular de- I pression in the porcelain member 19 and held 5 by screws 22 within the hemispherical metal 1 shell 9. Within an annular depression in the porcelain member 21 is located a metallic ring member 23, similar to 17, and has a downwardly-extending tongue 24, in which engages the binding-screw 25. A metallic plate 26. in which engages the binding-screw 27, is held on the under side of the porcelain 21..

28 is a vertically-extending screw whose axis corresponds with the axis of the shells 9 and 10 and of the cord-drop 13. The screw 28 engages at its lower end in the plate 26, and the check-nut 29 serves to secure screw 28 and plate 26 rigidly together. Between the head of the screw 28 and the plate 18 is the spiralspring 30, held under compression. This spring serves, therefore, to hold the rings 17 and 23 in contact with each other without preventing the relative rotation of the upper and lower hemispheres and their contents with respect to each other about the screw 28 as an axis.

The path of the current is as follows: from one of the conductors of the cord-drop 13 to the binding-screw 14, to the tongue 16 and ring 17,.to the ring 23 and tongue 24, to the binding-screw 25 and thence by conductor laid within the gooseneck T to one terminal of the socket 6, through the lamp-filament a to the other socket-terminal, thence by a conductor within the gooseneck 7 to the bindingscrew 27 and plate 26, through the screw 28 i to plate 18, binding-screw 15, and thence to l the other conductor of the cord-drop 13. This is the path of the current irrespective of the position to which the lamp 1 may be rotated i about the axis of the cord 13. For this rota- 1 tion screw 28 serves as an axis, while maintaining electrical communication between plates 18 and 26, and the hemisphere 9, gooseneck 7, and the lamp system, comprising socket 6, lamp 1, and reflector 2, may thus rotate relatively to the hemisphere 10 and the cord 13. From this it is apparent that the lamp 1 may be caused to assume any desired position in a horizontal plane and be independent of the twisting effects or tendencies of the cord 13, which except for this capacity of rotation would rotate the lamp to some undesired position. Simultaneously the advantage of horizontal disposition of the lamp is obtained, whereby the maximum illumination is in a direction vertically downward or in any other desired direction, according to the position of the reflector 2 with respect to the lamp.

G represents the axis of the cord-drop l3, and the gooseneck 7 and the lamp system are so disposed that the center of gravity of the tube 7 and the lamp system is in the axis G. In other words, the lamp system and member 7 are balanced about the axis of the cord, thus l insuring the lamp 1 assuming and maintaining the desired horizontal position.

By gooseneck or gooseneck member I do not wish to be limited to a member of the shape and structure of the member '7, but wish to include in such terms either a solid bar or tubular structure and of whatever shape, so long as such structure shall be, in effect, a counterbalancing member similar to member 7.

What I claim is 1. In combination, a supporting member, a lamp-socket. and a gooseneck member intermediate said lamp-socket and said supporting member, said gooseneck member being disposed eccentrically with respect to the axis of said supporting member.

2. In combination, a supporting member, a lamp system including a lamp having its axis approximately horizontal, and a gooseneck member intermediate said lamp system and said supporting member, said gooseneck member being so disposed as to counterbalance said lamp system about the axis of said supporting member. 7

3. In combination, a cord-drop, a lampsocket having its axis approximately horizontal, a gooseneck member for supporting said lamp-socket, and a rotatable connection intermediate said gooseneck and cord-drop, whereby electrical communication between the corddrop and said lamp-socket is maintained.

a. In combination, a supporting member, a lamp, a gooseneck member intermediate said lamp and said supporting member, and a reflector rotatable with respect to said lamp.

5. In combination, a cord-drop, a terminal base supported thereby, a member cooperating with said base and rotatable relatively thereto, terminals on said member, a housing for said terminal base and member, a lampsocket having its axis approximately horizontal, and a member intermediate said lampsocket and housing for supporting said lampsocket, and means for maintaining electrical communication between said cord-drop and lamp-socket.

6. In combination, a supporting member,a lamp, a gooseneck member intermediate said lamp and said supporting member, a rotatable connection intermediate said lamp and said supporting member, and a reflector rotatable with respect to said lamp.

7. In combination, a relatively fixed member carrying terminals in communication with supply-conductors, a lamp-socket having its axis approximately horizontal,a tubular member for supporting said lamp-socket, and a rotatable connection intermediate said tubular member and said relatively fixed member, whereby electrical communication between said lamp-socket and said supply-conductors is maintained.

8. In combination, a relatively fixed member, contact-terminals carried thereby, sup.

ply-conductors in communication with said terminals, a relatively rotatable member carrying contacts maintained in electrical communication with the terminals of said rela tively fixed member, a lamp-socket having its axis approximately horizontal supported by said relatively rotatable member, and a tubular member intermediate said lamp-socket and said relatively rotatable member.

9. In combination, a cord-drop, a lampsocket having its axis approximately horizontal, and a gooseneck member intermediate said lamp-socket and said cord-drop, said gooseneck member being disposed eccentricall y with respect to the axis of said cord-drop.

10. in combination, a cord-drop, a lampsocket having its axis approximately horizontal, a lamp engaging in said socket, and a tubular member intermediate said lamp-socket and said cord drr.)p, said tubular member being so disposed as to counterbalance said lamp about the axis of said cord-drop.

11. In combination, acord-drop, a lamp system, including a lamp having its axis approximately horizontal, and a tubular member intermediate said lamp system and said corddrop, said tubular member being so disposed as to counterbalance said lamp system about the axis of said cord-drop.

12. in combination, a cord-drop, a lamp system including a lamp having its axis approximately horizontal, and a gooseneck member intermediate said lamp system and said corddrop, said gooseneck member being so disposed as to counterbalance said lamp system about the axis of said cord-drop.

13. In combination, a cord-drop, alamp sys tem including a lamp having its axis approximately horizontal, a gooseneck member interlnediate said lamp system and said cord-drop, and a rotary connection intermediate said gooseneck member and said cord-drop for maintaining electrical comm u nication between said cord-drop and said lamp system.

1%. In combination, a cord-drop, a lampsocket, a lamp engaging in said socket and having its axis approximately horizontal, a rel'lector eoirperating with said lamp, and a gooseneck member intermediate said lamp-socket and said cord-drop, said gooseneck member being so disposed as to constitute with said lamp-socket, lamp, and reflector a system balanced about the axis of said cord-drop.

15. In combination, a cord-drop, a lamp system, and a gooseneck member intermediate said cord-drop and said lamp system, said gooseneck member being so disposed as to constitute with said lamp system a system balanced about the axis of said cord-drop.

16. In combination, acord-drop, alam p system including a lamp having its axis approximately horizontal, a gooseneck member intermediate said lamp system and said cord-drop, said gooseneck member being so disposed as to counterbalance said lamp system about the axis of said cord-drop, and a rotatable connec tion intermediate said gooseneck member and said cord-drop, whereby electrical communi cation is maintained between said cord-drop and said lamp system.

17. In combination, a relatively [ixed member carrying terminals in communication with supply-conductors, a lamp system including a lamp having its axis approximately horizontal, a gooseneck member For supporting said lamp system, a rotatable connection intermediate said gooseneck member and said relatively fixed member, whereby electrical communication between said lamp system and said supply-conductors is maintained, and a housing for said rotatable connection, comprising relativel y rotatable shell members.

18. In combination, a relatively lixed mem ber carrying terminals in communication with supply-00nductors, a lamp system including a lam p having its axis approximately horizontal, a gooseneck member intermediate said lamp system and said relatively lixed meml'ier, and a rotatable connection intermediate saidlamp system and said relatively fixed member, whereby electrical communication is main tained between said lamp system and said relatively lixed member. r

19. In combination, a cord-drop, alamp system, a gooseneck member intermediate said cord-drop and said lamp system, said gooseneck member being so disposed as to constitute with said lamp system a system balanced about the axis of said cord-dro1 and a rotatable connection intermediate said cord-drop and said lamp system, whereby said lamp sys tem is independent of any twisting tendency of said cord-drop.

20. In combination, a cord-drop, a lamp system including a lamp having its axis approxi mately horizontal, a gooseneck member intermediate said lamp system and said cord-dro1 said gooseneck member being so disposed as to constitute with said lamp system a s stem balanced about the axis of said cm'd-drop, and a rotatable connection intermediatesaid lamp systemand said cord-drop, whereby electrical communication is maintained between said lamp system and said corddrop, and whereby said lamp system is independent of any twisting tendency of said cord-drop.

HENRY DOLIER, JR.

W itnesses:

JOHN UoNNnLL, LILIAN M. Gimmick.

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